CN213761752U

CN213761752U - Multi-bed-layer parallel down-flow trickle bed reactor

Info

Publication number: CN213761752U
Application number: CN202022588795.6U
Authority: CN
Inventors: 随石磊; 范文博
Original assignee: Shandong Huibang New Material Co ltd
Current assignee: Shandong Huibang New Material Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-07-23
Anticipated expiration: 2030-11-11

Abstract

The utility model relates to a petrochemical technical field, concretely relates to parallelly connected downflow flow trickle bed reactor of many beds, including the reactor body, the reactor body includes reactor shell, inlet pipe, discharging pipe and sets up a plurality of reactor beds in the reactor shell, separates through the baffle between every reactor bed, and the end of inlet pipe is connected with the upper portion entry on every reactor bed respectively, the head end of discharging pipe respectively with the lower part exit linkage on every reactor bed. The down-flow trickle bed reactor of the utility model greatly reduces the particle diameter of the catalyst in the reactor and improves the diffusion efficiency of the gas-liquid phase in the catalyst by connecting a plurality of reactor beds in parallel under the condition of equal pressure drop; greatly reducing the rising rate of the pressure drop of the bed layer, thereby prolonging the operation time of the device; the height-diameter ratio of the reactor is improved, the diameter of the reactor is reduced, and the space utilization efficiency and the material utilization rate of the reactor are improved.

Description

Multi-bed-layer parallel down-flow trickle bed reactor

Technical Field

The utility model relates to a petrochemical technical field, concretely relates to parallelly connected downflow type trickle bed reactor of many beds.

Background

The downflow trickle bed reactor is a gas-liquid-solid three-phase catalytic reactor type, such as a downflow fixed bed hydrogenation reactor, the catalyst is in a solid phase and is fixedly arranged in the reactor, the liquid phase is a raw material to be reacted, and the gas phase is mainly hydrogen required by the reaction. Hydrogen and raw oil enter the reactor from the top of the reactor and are distributed through a gas-liquid distributor, so that uniform distribution in the radial direction of the reactor is ensured, and further, sufficient contact of gas-phase and solid-phase is ensured, and catalytic hydrogenation reaction is carried out.

The conventional down-flow fixed bed reactor basically adopts a top feeding mode and a bottom discharging mode, and a plurality of bed layers are arranged in the middle and connected in series.

In the use process of the hydrogenation reactor, metals, impurities carried in raw materials or coke generated by reaction and the like can be preferentially accumulated on an upper bed layer, so that the pressure drop of the whole system is increased, the shutdown of the device is further caused, and a top catalyst is replaced.

For the reaction process of high impurity content and coking-prone raw materials, in order to realize long-period stable operation, the conventional downflow type trickle bed reactor can only reduce the pressure drop of the bed layer by increasing the particle size of the catalyst and increasing the diameter of the bed layer of the reactor.

However, increasing the catalyst particle size results in a significant decrease in the gas-liquid phase diffusion performance on the catalyst inner surface, resulting in a significant decrease in the catalyst utilization efficiency. The increase of the diameter of the reactor leads to the problems that the pressure bearing capacity of the reactor is reduced, the wall thickness of the reactor is greatly improved, and the manufacturing difficulty of the reactor is greatly improved.

There is a need for a downflow trickle bed reactor that can reduce the rate of rise of pressure drop.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide a multi-bed parallel down-flow trickle bed reactor.

The purpose of the utility model is realized through the following technical scheme: the utility model provides a downflow type trickle bed reactor that many beds are parallelly connected, includes the reactor body, and the reactor body includes reactor shell, inlet pipe, discharging pipe and sets up a plurality of reactor beds in the reactor shell, separates through the baffle between every reactor bed, and the end of inlet pipe is connected with the upper portion entry of every reactor bed respectively, and the head end of discharging pipe is respectively with the lower part exit linkage of every reactor bed.

Further, a gas-liquid distributor is arranged at the upper part of each reactor bed layer.

Furthermore, a solid catalyst is placed in the middle of each reactor bed layer.

Further, a gas-liquid collector is arranged at the lower part of each reactor bed layer, a liquid phase outlet of the gas-liquid collector is connected with a delivery pipe, and the head end of the discharge pipe is connected with the tail end of the delivery pipe of each reactor bed layer.

Furthermore, each reactor bed layer is provided with a temperature detection device.

Further, an inlet pipeline is connected to an inlet at the upper part of each reactor bed layer, a flow regulating device is arranged on each inlet pipeline, the tail end of each feeding pipe is connected with the head end of each inlet pipeline of each reactor bed layer, and the tail end of each inlet pipeline is connected with the gas-liquid distributor.

Further, the number of reactor bodies is two, and the feed inlet of two reactor bodies links to each other, and two trickle bed reactor's discharge gate links to each other.

The beneficial effects of the utility model reside in that: the down-flow trickle bed reactor of the utility model greatly reduces the particle diameter of the catalyst in the reactor and improves the diffusion efficiency of the gas-liquid phase in the catalyst by connecting a plurality of reactor beds in parallel under the condition of equal pressure drop; greatly reducing the rising rate of the pressure drop of the bed layer, thereby prolonging the operation time of the device; the height-diameter ratio of the reactor is improved, the diameter of the reactor is reduced, and the space utilization efficiency and the material utilization rate of the reactor are improved.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Figure 2 is a schematic diagram of the structure of the reactor bed of the present invention.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

The reference signs are: the reactor comprises a reactor shell 1, a reactor bed layer 11, a partition plate 12, a gas-liquid distributor 13, a solid catalyst 14, a gas-liquid collector 15, a delivery pipe 16, a temperature detection device 17, an inlet pipeline 18, a flow regulating device 19, a feeding pipe 2 and a discharging pipe 3.

Detailed Description

In order to facilitate the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying fig. 1-3, which are not intended to limit the present invention.

Example one

Referring to fig. 1-2, a multi-bed parallel down-flow trickle bed reactor comprises a reactor body, wherein the reactor body comprises a reactor shell 1, a feed pipe 2, a discharge pipe 3 and a plurality of reactor beds 11 arranged in the reactor shell 1, each reactor bed 11 is separated by a partition plate 12, the tail end of the feed pipe 2 is connected with an upper inlet of each reactor bed 11, and the head end of the discharge pipe 3 is connected with a lower outlet of each reactor bed 11.

The down-flow trickle bed reactor of the utility model greatly reduces the particle diameter of the catalyst in the reactor and improves the diffusion efficiency of the gas-liquid phase in the catalyst by connecting a plurality of reactor beds 11 in parallel under the condition of equal pressure drop; greatly reducing the rising rate of the pressure drop of the bed layer, thereby prolonging the operation time of the device; the height-diameter ratio of the reactor is improved, the diameter of the reactor is reduced, and the space utilization efficiency and the material utilization rate of the reactor are improved.

The down-flow trickle bed reactor of the utility model is particularly suitable for the pretreatment process of materials with higher impurity content or easy reaction or large reaction heat effect, and is connected with a conventional down-flow reactor at the back.

The material with higher impurity content comprises: 1) heavy residual oil; 2) coal tar; 3) coal pitch, plant pitch; 4) catalyzing the oil slurry; 5) oil sand; 6) coal or biomass is directly liquefied to generate oil; 7) waste grease; 8) other oils with higher contents of colloids, asphaltenes and solid impurities.

The materials with high reactivity or high heat effect comprise:

1) animal and vegetable oils; 2) catalytic gasoline and diesel oil with high olefin content and coking gasoline and diesel oil; 3) medium and low temperature coal tar.

In this embodiment, a gas-liquid distributor 13 is disposed at the upper part of each reactor bed 11. The gas-liquid distributor 13 is used to distribute the gas-liquid two phases uniformly.

In this embodiment, a solid catalyst 14 is placed in the middle of each of the reactor beds 11.

In this embodiment, a gas-liquid collector 15 is disposed at the lower portion of each reactor bed 11, a liquid phase outlet of the gas-liquid collector 15 is connected to a delivery pipe 16, and a head end of the discharge pipe 3 is connected to a tail end of the delivery pipe 16 of each reactor bed 11.

In this embodiment, each reactor bed 11 is provided with a temperature detection device 17. The temperature detecting means 17 may be a thermocouple or the like to monitor the reaction.

In this embodiment, an inlet pipeline 18 is connected to an upper inlet of each reactor bed 11, a flow regulating device 19 is disposed on the inlet pipeline 18, the tail end of the feeding pipe 2 is connected to the head end of the inlet pipeline 18 of each reactor bed 11, and the tail end of the inlet pipeline 18 is connected to the gas-liquid distributor 13. The flow rate of each reactor bed 11 can be adjusted by the flow rate adjusting device 19, and the flow rate adjusting range is 0-100%.

Example two

Referring to fig. 3, the present embodiment is different from the first embodiment in that: the reactor body's quantity is two, and the feed inlet of two reactor bodies links to each other, and two trickle bed reactor's discharge gate links to each other.

The number of the reactor body of the utility model can be more than two, and any obvious replacement is all within the protection scope of the utility model under the premise of not departing from the concept of the utility model.

The above-mentioned embodiment is the utility model discloses the implementation of preferred, in addition, the utility model discloses can also realize by other modes, not deviating from the utility model discloses any obvious replacement is all within the protection scope under the prerequisite of design.

Claims

1. A multi-bed parallel downflow trickle bed reactor comprising a reactor body, characterized in that: the reactor body comprises a reactor shell, a feeding pipe, a discharging pipe and a plurality of reactor beds arranged in the reactor shell, each reactor bed is separated by a partition plate, the tail end of the feeding pipe is connected with an upper inlet of each reactor bed respectively, and the head end of the discharging pipe is connected with a lower outlet of each reactor bed respectively.

2. A multi-bed parallel downflow trickle bed reactor according to claim 1 wherein: and a gas-liquid distributor is arranged at the upper part of each reactor bed layer.

3. A multi-bed parallel downflow trickle bed reactor according to claim 1 wherein: and a solid catalyst is placed in the middle of each reactor bed layer.

4. A multi-bed parallel downflow trickle bed reactor according to claim 1 wherein: and the lower part of each reactor bed layer is provided with a gas-liquid collector, the liquid phase outlet of the gas-liquid collector is connected with a delivery pipe, and the head end of the discharge pipe is respectively connected with the tail end of the delivery pipe of each reactor bed layer.

5. A multi-bed parallel downflow trickle bed reactor according to claim 1 wherein: and each reactor bed layer is provided with a temperature detection device.

6. A multi-bed parallel downflow trickle bed reactor according to claim 2 wherein: the inlet at the upper part of each reactor bed layer is connected with an inlet pipeline, a flow regulating device is arranged on each inlet pipeline, the tail end of each feeding pipe is connected with the head end of the inlet pipeline of each reactor bed layer, and the tail end of each inlet pipeline is connected with the gas-liquid distributor.

7. A multi-bed parallel downflow trickle bed reactor according to claim 1 wherein: the reactor body's quantity is two, and the feed inlet of two reactor bodies links to each other, and two trickle bed reactor's discharge gate links to each other.